Platinum Cold Water (Wheat Germ) Koi & Goldfish Food is a wheat based diet ideal for feeding during colder period of the year. Low protein, low fat diet that is easily digested by fish during colder water temperatures. 5.0 mm (3/16") floating pellet with two year shelf life. Platinum Koi Food was developed through decades of research, Platinum Koi & Goldfish Food is fed by leading breeders and producers with consistently great results!